Improvement in valves for steamboat engines



` n. HALEY. Improvement inVelves for Seamboat Engines. No. 12o

Patentedct. 24,187L

iineneee UNITED STATES ANDREW M. HALEY, OF SIOUX CITY, IOWA.

IMPROVEMENT IN VALVES FOR STEAMBOAT ENGINES.

Specication forming part of Letters Patent N o. 120,269, dated October24, 1871.

To all whom it may concern:

Be it known that I, ANDREW M. HALEY, of Sioux City, in the county ofWoodbury and State of Iowa, have invented a new and useful Improvementin Valvefor Steamboat Engines; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawing forming part of thisspecification.

Figure 1 represents a longitudinal section of a steam-receiving andexhaust-pipe which is provided with my improved valve. Fig. 2 is adetail horizontal section of the valve on the line c c, Fig. l.

Similar letters of reference indicate corresponding parts.

My invention consists in the improvement in steamboat engine valves, ashereinafter fully described and subsequently pointed out in the claim.

A in the drawing is the steam supply-pipe, terminatin g in the upperpart of an upright cylindrical chamber, B, whose open lower endcommunicates with the steam cylinder. O is the exhaust-pipe leading fromthe lower part of the chamber B. D is a tube open at both ends, f1ttedwithin the chamber B through an annular plate, a, which separates thelower from the upper part of said chamber. The lower edge of the tube Dis so shaped as to fit the valve-seat b at the lower end of the chamberB. The tube D, when lowered upon the seat b, as shown at the left-handside of Fig. l, constitutes a valve for preventing the escape of steamfrom the steamcylinder to the exhaust-pipe, while, when elevated, as onthe right-hand side of Fig. 1, it opens the exhaust. E is a circularvalve, suspended from a rod, F, and shaped to fit the lower end of thetubular valve D. W'hen the valve D is raised to open the exhaust thevalve E is also elevated, as at the right-hand side of Fig. 1, toprevent the supply of steam to the cylinder. When the hollow valve islowered, as at the left-hand side of Fig. l, the valve E is alsolowered, to permit the entrance of steam to the steam-cylinder, theexhaust being meanwhile closed by the hollow valve. To form the cut-offthe valve E is drawn up into the hollow valve, and the dead-plate inthat part of the valve E which first closes into the valve D forms thecutoft' as it is stopped on the up-motion with the cutoff before itquite draws into the seat ofthe valve D. To make the exhaust, the valveE is started on the 11p-motion and draws the hollow valve out of itsseat. d Z are packing-rings, held down upon'the plate b by an annularfollower, G, so that they contract around the tube D. Other suitablepacking devices may be used instead. e e are screws, which pass throughthe cap of the chamber B, to hold the follower G iirm on thepacking-rings. The pressure of steam on top of the hollow valve makes itfollow the valve E down until it reaches the seat b. The valve E pressesthem still further down until the valve D is fully opened. There may beperforated `.guides f fin the tube D, steadying the motion of the stemF.

By the use of my hollow valve the exhaustchamber is done away with,aswell as considerable top-rigging of the engine, anda certainproportion of steam revolutions economized.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. A steam supply-pipe, A, and exhaust-pipe C, combinedwith a chamber, B, communicating with steam-cylinder and with saidexhaust-pipe, as described.

2. The combination with said chamber B of the open-ended tube D, movabletherethrough,V

and the exhaust O having valve-seat b, for the purpose speciiied.

3. The combination with said chamber B, openended tube D, and exhaust Chaving valve-seat b, of the circular valve E, all constructed to operatein the manner described.

ANDREW M. HALEY.

Witnesses:

J AErEs A. SAwYEEs,

GHAELEs H. BosTwIoK. (152)

